Is it possible to modify the time it takes to update Fisheye after a Stash modification?

" Is there a way to increase the speed of the updates from the branches in Stash to the branches available in FishEye? Sometimes we see up to a 1-2 hour lag time between when code is checked into Stash to when the corresponding branch is available to review in FishEye. Would be really helpful to increase this sync speed if possible."